Anytime I invoke a method on a COM object with one or more arguments,
I get the following error:
Could not convert argument 0 for call to Open. (ArgumentError)
What''s preplexing is the argument number is always the last argument,
so if there are four arguments, the error will be on argument 3. Here
is an example script that gives the error above:
def new_com_object(prog_id)
System::Activator.CreateInstance(System::Type.GetTypeFromProgID(prog_id))
end
xls = new_com_object(''Excel.Application'')
xls.Visible = true
xls.Workbooks.Open(''c:\\Book1.xls'')
--
Shane Emmons
On Thu, Feb 18, 2010 at 3:42 PM, Shane Emmons <semmons99 at gmail.com> wrote:> Anytime I invoke a method on a COM object with one or more arguments, > I get the following error: > ?Could not convert argument 0 for call to Open. (ArgumentError) > > What''s preplexing is the argument number is always the last argument, > so if there are four arguments, the error will be on argument 3. Here > is an example script that gives the error above: > > def new_com_object(prog_id) > ?System::Activator.CreateInstance(System::Type.GetTypeFromProgID(prog_id)) > end > > xls = new_com_object(''Excel.Application'') > xls.Visible = true > xls.Workbooks.Open(''c:\\Book1.xls'') > > -- > Shane Emmons >I figured it out, needed to to String#to_clr_string on every argument. -- Shane Emmons
Just so you know, the WIN32OLE library wraps the COM initialization and removes the need for to_clr_string. Require ''win32ole'' WIN32OLE.new ''Excel.Application'' This will also be cross compatible with MRI. Tomas: Can we make Shane''s case work without requiring the cast to CLR string? JD -----Original Message----- From: Shane Emmons <semmons99 at gmail.com> Sent: Friday, February 19, 2010 7:02 AM To: ironruby-core at rubyforge.org <ironruby-core at rubyforge.org> Subject: Re: [Ironruby-core] COM Interop Problem On Thu, Feb 18, 2010 at 3:42 PM, Shane Emmons <semmons99 at gmail.com> wrote:> Anytime I invoke a method on a COM object with one or more arguments, > I get the following error: > Could not convert argument 0 for call to Open. (ArgumentError) > > What''s preplexing is the argument number is always the last argument, > so if there are four arguments, the error will be on argument 3. Here > is an example script that gives the error above: > > def new_com_object(prog_id) > System::Activator.CreateInstance(System::Type.GetTypeFromProgID(prog_id)) > end > > xls = new_com_object(''Excel.Application'') > xls.Visible = true > xls.Workbooks.Open(''c:\\Book1.xls'') > > -- > Shane Emmons >I figured it out, needed to to String#to_clr_string on every argument. -- Shane Emmons _______________________________________________ Ironruby-core mailing list Ironruby-core at rubyforge.org http://rubyforge.org/mailman/listinfo/ironruby-core
Thanks, that''s really handy. Just an FYI, I figured out the #to_clr_string when going through the documentation on IronRuby.net which is currently reporting the following error anywhere I assume you mean to have code: reference to undefined name ''syntax'' On Fri, Feb 19, 2010 at 11:10 AM, Jim Deville <jdeville at microsoft.com> wrote:> Just so you know, the WIN32OLE library wraps the COM initialization and removes the need for to_clr_string. > > Require ''win32ole'' > WIN32OLE.new ''Excel.Application'' > > > This will also be cross compatible with MRI. > > Tomas: Can we make Shane''s case work without requiring the cast to CLR string? > > JD > > > > -----Original Message----- > From: Shane Emmons <semmons99 at gmail.com> > Sent: Friday, February 19, 2010 7:02 AM > To: ironruby-core at rubyforge.org <ironruby-core at rubyforge.org> > Subject: Re: [Ironruby-core] COM Interop Problem > > > On Thu, Feb 18, 2010 at 3:42 PM, Shane Emmons <semmons99 at gmail.com> wrote: >> Anytime I invoke a method on a COM object with one or more arguments, >> I get the following error: >> ?Could not convert argument 0 for call to Open. (ArgumentError) >> >> What''s preplexing is the argument number is always the last argument, >> so if there are four arguments, the error will be on argument 3. Here >> is an example script that gives the error above: >> >> def new_com_object(prog_id) >> ?System::Activator.CreateInstance(System::Type.GetTypeFromProgID(prog_id)) >> end >> >> xls = new_com_object(''Excel.Application'') >> xls.Visible = true >> xls.Workbooks.Open(''c:\\Book1.xls'') >> >> -- >> Shane Emmons >> > > I figured it out, needed to to String#to_clr_string on every argument. > > -- > Shane Emmons > _______________________________________________ > Ironruby-core mailing list > Ironruby-core at rubyforge.org > http://rubyforge.org/mailman/listinfo/ironruby-core > > _______________________________________________ > Ironruby-core mailing list > Ironruby-core at rubyforge.org > http://rubyforge.org/mailman/listinfo/ironruby-core >-- Shane Emmons